2 * linux/drivers/pcmcia/pxa2xx_mainstone.c
4 * Mainstone PCMCIA specific routines.
6 * Created: May 12, 2004
7 * Author: Nicolas Pitre
8 * Copyright: MontaVista Software Inc.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/kernel.h>
18 #include <linux/errno.h>
19 #include <linux/interrupt.h>
20 #include <linux/device.h>
22 #include <pcmcia/ss.h>
24 #include <asm/hardware.h>
27 #include <asm/arch/mainstone.h>
29 #include "soc_common.h"
32 static struct pcmcia_irqs irqs[] = {
33 { 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },
34 { 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },
35 { 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },
36 { 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },
39 static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
41 skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
42 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
45 static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
47 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
50 static unsigned long mst_pcmcia_status[2];
52 static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
53 struct pcmcia_state *state)
55 unsigned long status, flip;
57 status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
58 flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
61 * Workaround for STSCHG which can't be deasserted:
62 * We therefore disable/enable corresponding IRQs
63 * as needed to avoid IRQ locks.
66 mst_pcmcia_status[skt->nr] = status;
67 if (status & MST_PCMCIA_nSTSCHG_BVD1)
68 enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
69 : MAINSTONE_S1_STSCHG_IRQ );
71 disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
72 : MAINSTONE_S1_STSCHG_IRQ );
75 state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
76 state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
77 state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
78 state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
79 state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1;
80 state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1;
81 state->wrprot = 0; /* not available */
84 static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
85 const socket_state_t *state)
87 unsigned long power = 0;
91 case 0: power |= MST_PCMCIA_PWR_VCC_0; break;
92 case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
93 case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
95 printk(KERN_ERR "%s(): bad Vcc %u\n",
96 __FUNCTION__, state->Vcc);
100 switch (state->Vpp) {
101 case 0: power |= MST_PCMCIA_PWR_VPP_0; break;
102 case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
104 if(state->Vpp == state->Vcc) {
105 power |= MST_PCMCIA_PWR_VPP_VCC;
107 printk(KERN_ERR "%s(): bad Vpp %u\n",
108 __FUNCTION__, state->Vpp);
113 if (state->flags & SS_RESET)
114 power |= MST_PCMCIA_RESET;
117 case 0: MST_PCMCIA0 = power; break;
118 case 1: MST_PCMCIA1 = power; break;
125 static void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
129 static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
133 static struct pcmcia_low_level mst_pcmcia_ops = {
134 .owner = THIS_MODULE,
135 .hw_init = mst_pcmcia_hw_init,
136 .hw_shutdown = mst_pcmcia_hw_shutdown,
137 .socket_state = mst_pcmcia_socket_state,
138 .configure_socket = mst_pcmcia_configure_socket,
139 .socket_init = mst_pcmcia_socket_init,
140 .socket_suspend = mst_pcmcia_socket_suspend,
144 static struct platform_device *mst_pcmcia_device;
146 static int __init mst_pcmcia_init(void)
150 mst_pcmcia_device = kmalloc(sizeof(*mst_pcmcia_device), GFP_KERNEL);
151 if (!mst_pcmcia_device)
153 memset(mst_pcmcia_device, 0, sizeof(*mst_pcmcia_device));
154 mst_pcmcia_device->name = "pxa2xx-pcmcia";
155 mst_pcmcia_device->dev.platform_data = &mst_pcmcia_ops;
157 ret = platform_device_register(mst_pcmcia_device);
159 kfree(mst_pcmcia_device);
164 static void __exit mst_pcmcia_exit(void)
167 * This call is supposed to free our mst_pcmcia_device.
168 * Unfortunately platform_device don't have a free method, and
169 * we can't assume it's free of any reference at this point so we
170 * can't free it either.
172 platform_device_unregister(mst_pcmcia_device);
175 module_init(mst_pcmcia_init);
176 module_exit(mst_pcmcia_exit);
178 MODULE_LICENSE("GPL");